Final answer:
To find the 99% confidence interval for the mean concentration of uric acid in the patient's blood, we can use the t-distribution.
Step-by-step explanation:
The mean concentration of uric acid in the patient's blood over a period of three months is 5.35 mg/dl, with a standard deviation of 1.85 mg/dl. To find the 99% confidence interval for the mean concentration of uric acid, we can use the formula:
confidence interval = mean ± (z * standard deviation / square root of sample size)
Since we don't know the sample size in this case, we'll use the t-distribution. The t-distribution is similar to the normal distribution, but it is used when the sample size is small or when the population standard deviation is unknown.